base64url

What is base64url?

The base64url npm package provides utilities for encoding and decoding data in base64url format, which is a URL-safe variant of base64. It is commonly used to encode data in a way that can be safely transmitted over URLs without encoding issues.

What are base64url's main functionalities?

Encoding to base64url

This feature allows you to encode a string or buffer into base64url format. The provided code sample demonstrates how to encode the string 'Hello World!' using the base64url package.

"use strict"; const base64url = require('base64url'); const encoded = base64url('Hello World!'); console.log(encoded);

Decoding from base64url

This feature enables you to decode a base64url encoded string back into its original form. The code sample shows how to decode the string 'SGVsbG8gV29ybGQh' back to 'Hello World!'.

"use strict"; const base64url = require('base64url'); const decoded = base64url.decode('SGVsbG8gV29ybGQh'); console.log(decoded);

From base64 to base64url

This feature allows you to convert a base64 encoded string to a base64url encoded string. The code sample illustrates converting a base64 string 'SGVsbG8gV29ybGQh==' to base64url format.

"use strict"; const base64url = require('base64url'); const base64 = 'SGVsbG8gV29ybGQh=='; const base64urlString = base64url.fromBase64(base64); console.log(base64urlString);

To base64 from base64url

This feature converts a base64url encoded string back to a standard base64 encoded string. The code sample demonstrates converting 'SGVsbG8gV29ybGQh' from base64url to regular base64.

"use strict"; const base64url = require('base64url'); const base64urlString = 'SGVsbG8gV29ybGQh'; const base64 = base64url.toBase64(base64urlString); console.log(base64);

Other packages similar to base64url

js-base64

js-base64 is a robust base64 encoder/decoder that is fully compatible with `atob()` and `btoa()`, built to work in both browser and Node.js environments. It offers similar functionality to base64url but does not focus specifically on URL-safe encoding.

base64-js

base64-js is a package that provides functions to encode and decode base64 data. It is similar to base64url but does not inherently provide URL-safe encoding, which means it might require additional steps to handle URL encoding.

urlsafe-base64

urlsafe-base64 is a package that offers encoding and decoding functions specifically designed to be safe for use in URLs, similar to base64url. It provides a straightforward API for handling base64 encoding with URL safety in mind.

README

base64url

Converting to, and from, base64url

Install

$ npm install base64url

After installing with npm you can require this library from JavaScript or TypeScript:

JavaScript

const base64url = require('base64url');

TypeScript:

import base64url from "base64url";

Usage

CLI

The CLI has been removed. For the time being, please install base64url@1.0.6 if you need the CLI.

Library

base64url(input: string | Buffer, encoding: string = "utf8"): string

base64url.encode(input: string | Buffer, encoding: string = "utf8"): string

base64url encode input. Input should be a string or a Buffer.

Example

> base64url("ladies and gentlemen we are floating in space")
'bGFkaWVzIGFuZCBnZW50bGVtYW4sIHdlIGFyZSBmbG9hdGluZyBpbiBzcGFjZQ'

---

base64url.decode(input: string, encoding: string = "utf8"): string

Convert a base64url encoded string into a raw string. The encoding argument can be used if the input is a string that's not utf8.

> base64url.decode("cmlkZTogZHJlYW1zIGJ1cm4gZG93bg")
'ride: dreams burn down'

---

base64url.fromBase64(input: string): string

Convert a base64 encoded string to a base64url encoded string.

Example

> base64url.fromBase64('qL8R4QIcQ/ZsRqOAbeRfcZhilN/MksRtDaErMA==')
'qL8R4QIcQ_ZsRqOAbeRfcZhilN_MksRtDaErMA'

---

base64url.toBase64(input: string): string

Convert a base64url encoded string to a base64 encoded string.

> base64url.toBase64('qL8R4QIcQ_ZsRqOAbeRfcZhilN_MksRtDaErMA')
'qL8R4QIcQ/ZsRqOAbeRfcZhilN/MksRtDaErMA=='

---

base64url.toBuffer(input: string): Buffer

Convert a base64url encoded string to a Buffer containing the decoded bytes.

> base64url.toBuffer('c3Bpcml0dWFsaXplZA')
<Buffer 73 70 69 72 69 74 75 61 6c 69 7a 65 64>

Alternatives

• base64-url

Supported Node.js versions

This library should be used with current versions of the Node.js runtime's long-term stable (LTS) schedule. More information can be found at the Node.js Release Working Group repo.

License

MIT

Copyright (c) 2013–2016 Brian J. Brennan

Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:

The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.